Friction Washer

Structure & Working Principle — Why Is It So Effective at Deep Cleaning Plastic?

Core Structure:
Inside the friction washer, a long central shaft is fitted with dozens of angled blades or paddles, creating a high-speed, turbulent flow path. As plastic flakes or granules move through the rotating chamber, they are continuously subjected to intense friction and impact against the blades and water flow. This process effectively removes labels, grease, and dust adhered to the plastic surface.

Screen Drum Design:
The chamber features a stainless steel screen drum, where plastic is rinsed during frictional motion. Impurities are discharged through perforations, while the cleaned material exits from the top outlet.

Inclined Angle:
The equipment is typically installed at a 35°–45° incline, which helps accelerate material discharge via gravity and prevents clogging or material buildup.

Dewatering Integration:
Can be paired with a screw dewatering unit or spray rinsing system to minimize residual moisture and avoid secondary contamination during the cleaning process.

Compared to traditional soaking or rinsing methods, friction washing offers a faster, more water-efficient cleaning solution.

It is often placed between the rinsing and hot washing stages, or used as the final intensive cleaning unit to enhance product quality — especially for meeting export-grade pellet standards.

Note:
Some users mistakenly believe that a screw conveyor can replace a friction washer. While both move material upward, the screw conveyor consists of continuous metal blades and lacks effective internal scrubbing — even when water is added. Therefore, its cleaning capability is very limited compared to a dedicated friction washer.